The successor to the Intel 8008. The 8080 had a 16-bit address bus and an 8-bit data bus. It had seven 8-bit registers (six which could also be combined as three 16-bit registers), a 16-bit stack pointer to memory which replaced the 8008’s internal stack and a 16-bit program counter. It also had 256 I/O ports (so I/O devices could be connected without needing to allocate any addressing space as is required for memory mapped devices) and a signal pin that allowed the stack to occupy a separate bank of memory.
Shortly after the 8080, the Motorola 6800 was introduced.
- Intel 8085
processor A microprocessor intended to be an improved Intel 8080, as was the Zilog Z80. (1994-10-31)
- Intel 8086
processor A sixteen bit microprocessor chip used in early IBM PCs. The Intel 8088 was a version with an eight-bit external data bus. The Intel 8086 was based on the design of the Intel 8080 and Intel 8085 (it was source compatible with the 8080) with a similar register set, but was expanded to 16 […]
- Intel 8088
processor An Intel 8086 with 16-bit registers and an 8-bit data bus. The 8088 was the processor used in the original IBM PC. (1995-02-21)
- Intel 80×86
processor (x86) One of the family of Intel microprocessors including the Intel 80186, Intel 80286, Intel 80386, Intel 486, in a more general sense also Intel 8086, Pentium, Pentium Pro, and Pentium II. The abbreviation “x86” also includes compatible processors, e.g. from Cyrix or AMD. (2004-02-27)